Cubase sl2 on windows7

I have had Cubase sl2 for years and not used it. Now I have a newer computer running windows 7 and installed Cubase on it. It ran and I recorded a quick song. Today I clicked on it and it gave me a message during loading that said " Your current liscense does not allow you to use this application and it said at the top Nero wave editor. I clicked OK and it contiued to load. Then another window popped up saying it can’t open the program and windows was checking for a solution. Then another window saying windows will shut this program down and notify you if it finds a solution. WTF? Anyone know how to remedy this?